From 63560396536e9eb8858826fcbfc14d4015a41a95 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Fri, 19 Feb 2010 11:51:59 +0100 Subject: [PATCH] drm/i915: ensure lru ordering of fence_list The fence_list should be lru ordered for otherwise we might try to steal a fence reg from an active object even though there are fences from inactive objects available. lru ordering was obeyed for gpu access everywhere save when moving dirty objects from flushing_list to active_list. Fixing this cause the code to indent way to much, so I've extracted the flushing_list processing logic into its on function. Signed-off-by: Daniel Vetter Reviewed-by: Chris Wilson Signed-off-by: Eric Anholt --- drivers/gpu/drm/i915/i915_gem.c | 57 ++++++++++++++++++++------------- 1 file changed, 34 insertions(+), 23 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index ce1c0262bc63..4b6d427ff7cd 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1558,6 +1558,38 @@ i915_gem_object_move_to_inactive(struct drm_gem_object *obj) i915_verify_inactive(dev, __FILE__, __LINE__); } +static void +i915_gem_process_flushing_list(struct drm_device *dev, + uint32_t flush_domains, uint32_t seqno) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + struct drm_i915_gem_object *obj_priv, *next; + + list_for_each_entry_safe(obj_priv, next, + &dev_priv->mm.gpu_write_list, + gpu_write_list) { + struct drm_gem_object *obj = obj_priv->obj; + + if ((obj->write_domain & flush_domains) == + obj->write_domain) { + uint32_t old_write_domain = obj->write_domain; + + obj->write_domain = 0; + list_del_init(&obj_priv->gpu_write_list); + i915_gem_object_move_to_active(obj, seqno); + + /* update the fence lru list */ + if (obj_priv->fence_reg != I915_FENCE_REG_NONE) + list_move_tail(&obj_priv->fence_list, + &dev_priv->mm.fence_list); + + trace_i915_gem_object_change_domain(obj, + obj->read_domains, + old_write_domain); + } + } +} + /** * Creates a new sequence number, emitting a write of it to the status page * plus an interrupt, which will trigger i915_user_interrupt_handler. @@ -1616,29 +1648,8 @@ i915_add_request(struct drm_device *dev, struct drm_file *file_priv, /* Associate any objects on the flushing list matching the write * domain we're flushing with our flush. */ - if (flush_domains != 0) { - struct drm_i915_gem_object *obj_priv, *next; - - list_for_each_entry_safe(obj_priv, next, - &dev_priv->mm.gpu_write_list, - gpu_write_list) { - struct drm_gem_object *obj = obj_priv->obj; - - if ((obj->write_domain & flush_domains) == - obj->write_domain) { - uint32_t old_write_domain = obj->write_domain; - - obj->write_domain = 0; - list_del_init(&obj_priv->gpu_write_list); - i915_gem_object_move_to_active(obj, seqno); - - trace_i915_gem_object_change_domain(obj, - obj->read_domains, - old_write_domain); - } - } - - } + if (flush_domains != 0) + i915_gem_process_flushing_list(dev, flush_domains, seqno); if (!dev_priv->mm.suspended) { mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD); -- 2.20.1